More than half of Americans — 54% — believe that medical marijuana use should be legalized in the United States, according to a new Gallup poll.

The percentage of Americans who say they favor legalizing medical marijuana jumped to 56% in the survey, which was conducted June 6-9.

Only about a third (32%) said they oppose it.

Gallup has tracked the public’s views on marijuana in recent years, and its latest poll is among the most comprehensive on the topic in decades.

The pollsters surveyed 2,000 adults nationwide from June 6 through June 9, and the results were weighted to the population’s gender, age and education level.

The poll has a margin of error of plus or minus 2 percentage points.